maths
posted by courtney .
1. Q: 23x5 when x=(3)
A: 24
2. Q: 6x+4 when x=5
A: 5
_______________
Simplify the expression.
1. (4)(x)(x^2)
my answer: 4x^3
2. (24)(5x)(x)
my answer: 120x^2
3. x(4x)
my answer: 4xx
4. 4t(t+2)
my answer: 4t^2+(6t)
5. b^2(4b^2)
my answer: 4b^2b^4
6. (c+3c^2)(c^2)
my answer: c^3+(3c^4)
Can you check and see if my answers are right? Any help is appreciated.

redo the first one.
then 3,4 are wrong. 
3. 4xx^2
4. 4t^2+(8t)
please check those again.
and when you say redo number 1, which one do you mean:
a. 23x5 when x=(3)
or
b. (4)(x)(x^2)
thanks!! :) 
The first one?1. Q: 23x5 when x=(3)
A: 24